Alam Kuh, Alborz Mountains, Lashkarak Formation (Ordovician of Iran)

Where: Iran (36.3° N, 51.0° E: paleocoordinates 19.5° S, 134.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lashkarak Formation, Tremadocian (485.4 - 477.7 Ma)

• Lashkarak (Lashkerak) Formation

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, calcareous marl and lithified shale

Size class: macrofossils

Primary reference: D. L. Bruton, A. J. Wright, and M. A. Hamedi. 2004. Ordovician Trilobites from Iran. Palaeontographica Abteilung A 271(5-6):111-149 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 66865: authorized by Wolfgang Kiessling, entered by Uta Merkel on 19.10.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Trilobita
 Corynexochida - Illaenidae
 Asaphida - Asaphidae
"Megalaspis sp." = Megistaspis, Ogygites yunnanensis, "Presbynileus (Protopresbynileus) sp." = Protopresbynileus, Asaphellus sp., Pseudoasaphus sp.
"Megalaspis sp." = Megistaspis Jaanusson 1956 trilobite
"Presbynileus (Protopresbynileus) sp." = Protopresbynileus Hintze 1954 trilobite
Asaphellus sp. Callaway 1877 trilobite
Pseudoasaphus sp. Schmidt 1901 trilobite
 Asaphida - Nileidae
Nileus cf. exarmatus Tjernvik 1956 trilobite
Strophomenata
 Billingsellida - Clitambonitidae
Hemipronites sp. Pander 1830
Rhynchonellata
 Orthida - Orthidae
"Orthis cf. calligramma" = Orthambonites calligramma
"Orthis cf. calligramma" = Orthambonites calligramma Dalman 1828
Gastropoda
 Euomphalina - Holopeidae
? Holopea sp. Hall 1847 snail
Cephalopoda
 Orthocerida - Orthoceratidae
Michelinoceras sp. Foerste 1932
 Endocerida - Endoceratidae
Endoceras sp. Hall 1847
Rhombifera
 Caryocystitidacea - Echinosphaeritidae
Echinosphaerites sp. Wahlenberg 1818
Diploporita
  -
 Aristocystitoida - Aristocystitidae